Which is the core of this project, here we are utilizing PIC 16F877A microcontroller. This detects the ADC data
and calibrates the values and control the cooling fan.

2) A/D Conversion:

This part is taking control of getting the temperature analog values to programmable digital signals.

3) Sensing Unit:

This section is having the temperature sensor to sense the temperature level in the device.

4) Display Unit:

The temperature levels in the device are displayed through display unit (LCD).

Over view of projects:

In this project temperature is maintained for device by utilizing cooling fan. Temperature of the device is
sensed by the temperature sensor and the sensed equivalent analog temperature value is given to the ADC section
of the microcontroller the ADC value is analyzed. If the maintained temperature value is out of range then motor
driver drives the cooling fan to maintain temperature in range.

Temperature Calibration

The temperature sensor is typically accurate to within 2ºC before calibration. To improve accuracy, you will need an
extension cable between the circuit board and the sensor as well as ice-water slurry. Place the sensor in the slurry and
measure its output voltage using a voltmeter. Use the measured value in the following correction factor: